﻿/*                       NOTICE
 * 
 * This software was produced for the U. S. Government
 * under Contract No. FA8721-10-C-0001, and is
 * subject to the Rights in Noncommercial Computer Software
 * and Noncommercial Computer Software Documentation Clause
 * (DFARS) 252.227-7014 (JUN 1995)
 * 
 * Approved for Public Release: 11-2435
 * © 2011 The MITRE Corporation. All Rights Reserved. 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Xna.Framework;
using TUIO;


namespace MXSE.MultiTouch.Gestures
{
    public abstract class BasicGesture : Gesture
    {

        // Couple basic variables
        public DateTime startTime;
        public DateTime endTime;
        public Vector3 startPosition;
        public Vector3 lastPosition;
        public Vector3 currentPosition;
        public Vector3 speed;

        //Called to set the EndTime of a BasicGesture.
        public void End()
        {
            endTime = DateTime.Now;
        }

        /// <summary>
        /// Calls base.Update() to perform necessary Actions,
        /// then updates the lastPosition variable to the currentPosition.
        /// </summary>
        public override void Update()
        {
            if (Parent != null && !Parent.Destroyed())
                Parent.Update();
        }

        /// <summary>
        /// Called by ContactManager.ContactChanged(ContactEventArgs cea) to
        /// update the current position of the gesture.  Does not change the
        /// lastPosition at all, as that's done in the Update loop.
        /// </summary>
        /// <param name="cea"></param>
        public virtual void UpdateCurrentPosition(TuioCursor contact)
        {
            lastPosition = currentPosition;
            currentPosition.X = contact.getX();
            currentPosition.Y = contact.getY();
            currentPosition.Z = contact.getZ();
            speed.X = contact.getXSpeed();
            speed.Y = contact.getYSpeed();
            speed.Z = contact.getZSpeed();
            Update();
        }

    }
}
